Pie-crust-forming machine.



0. GOLBORNE.

PIE CRUST FORMING MACHINE.

APPLIOATION IILBD MAY 25, 1908.

Patented May 3, 1910.

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PIE CRUST FORMING MACHINE.

APPLICATION FILED MAY 25, 1908."

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wmw i fl ZZ ZWM OLIVER GOLBORNE, OF CHICAGO, ILLINOIS.

PIE-GRUST-FORMING MACHINE.

Specification of Letters Patent.

Patented May 3, 1910.

Application filed May 25, 1908. Serial No. 434,749.

To all whom it may concern:

Be it known that I, OLIVER COLBORJE, a

citizen of the United States of America, and a resident of Chicago,county of Cook, State of Illinois, have invented certain new and usefulImprovements in Pie-Crust- Forming Machines, of which the following is aspecification.

The main object of this invention is to provide an improved form of piecrust forming apparatus which is capable of rolling out a mass of dough,dividing it into sections of equal size, rolling out each section intothe form of a thin flat disk suitable for use as a pie crust, withlittle waste, and delivering such crusts singly and in succession to adelivery platform. This object is accomplished by the device shown inthe accompanying drawings, in which Figure 1 is a side elevation of apie crust forming machine constructed according to this invention. Fig.2 is a top plan of the same. Fig. 3 is a section of the same on the lineA-A of Fig. 1. Fig. 4 is a sectional detail of the cutting knife on theline BB of Fig. 3. Fig. 5 is a sectional detail on the line CC of Fig.3. Fig. 6 is a top plan showing the shape of the cuts which are made inthe strip of dough in its passage between the two sets of rollers. Fig.7 is a transverse section on the line DD of Fig. 6. Fig. 8 is a detailshowing the approximate shape of the finished crusts and indicating by adotted circle the size to which it is trimmed.

In the form shown in the drawings, the apparatus comprises a feed hopper1 which is adapted to hold a quantity of dough and which is so placed inthe frame as to direct its contents into the trough between a pair ofrollers 2 and 3 which are journaled on horizontal axes in the supportingframe 4;. The rollers 2 and 3 are opposed to each other and so gearedthat the'dough from the hopper 1 will be drawn between them and formedinto a continuous strip of substantially uniform transverse section. Thelower roller 3 is preferably cylindrical, while the upper roller 2 isgrooved so as to present a concave surface toward the lower roller, thegroove being of such form as to roll the strip to a section like that ofFig. 7, being con siderably thicker in the middle than at its edges.

An inclined platform 5 guides the strip of dough which 1s indicated at 6in Fig. 1

endwise toward a second set of rollers 7, from which it passes upon adelivery platform 8. The rollers 7 are preferably both of cylindricalform, and are spaced closer together than the rollers 2 and 3, so as toroll out the dough into a thin flat sheet indicated at 6 in Fig. 1. Theplatform 5 together with the lower rollers 3 and 7 form the feed surfacealong which the dough passes through the machine.

For the purpose of dividing the dough into uniform pieces, each of whichis sufiicient for a single pie crust, the strip 6 is cut up into narrowsections by means of a reciprocating knife or cutter 9 which is car riedby a cross head 10 slidably mounted in guides 11 in the supportingframe. The cross head 10 is urged downward by means of a pair of cams 12carried by the shaft 13. The cross head 10 is normally urged upward bymeans of springs 14, and the cam shaft 13 is geared to the shaft of theroller 2 by gears which are so proportioned that the space betweensuccessive cuts in the strip of dough will be right for forming eachsection into a substantially circular sheet after it passes the rollers7.

The rollers 7 are driven from the roller 3 by means of the link-belt 16,and the sprockets which carry said belt are so proportioned that therollers 7 will be driven at a considerablly greater speed than therollers 2 and 3. This increase of speed is for the purpose of advancingthe pieces of dough with suflicient rapidity so that the elongationwhich takes place in passing between the rollers 7 will not interferewith the advance of the succeeding piece of dough.

In order that the dough will roll to an approximately circular shape,the strip 6 is made thicker in the middle than at its edges, and thecutter is preferably curved and placed with its concave side facingrearwardly so that the cuts in the strip will appear as illustrated inFig. 7, the arrow indicating the direction in which the strip advances.Scrapers 17 are provided for preventing the dough from adhering to theupper rollers 2 and 7. Power is applied by the pulley 18. Thearrangement of gearing will be readily understood from Figs. 1 and 2,without detailed description.

The operation of the device shown is as follows :A quantity of dough isplaced in the hopper 1 and is drawn between the rollers 2 and 3, beingthereby rolled into a continuous strip having a cross-section like thatshown in Fig. '7. The strip advances along the platform 5 by gravity dueto the inclination of said platform. The continuous rotation of the camshaft 13 causes the cutter 9 to reciprocate and cut the strip intooblong sections whose long dimension corresponds to the width of thestrip (3. These sections enter between the rollers 7 with their longdimensions substantially parallel with the axis of said rollers and arethen rolled out to about the form shown at 6" in Fig. 8. The shape ofthe groove in the roller 2 is so designed in proportion to the distancebetween cuts made by the cutter 9, that the elongating effect of therollers 7 will produce a sheet of the desired shape.

What I claim as my invention and desire to secure by Letters Patentis 1. The combination of mechanism adapted to form a mass of plasticmaterial into a strip of substantially uniform cross-section, means forfeeding said strip lengthwise, a cutter mounted to operateintermittently across the path of said strip for cut ting the same intoa series of sections of substantially uniform size as it is fed along,and means for rolling said sections so as to form each into a flat sheetof substantially uniform thickness, said cutter being curved and concavetoward the direction from which said strip is fed.

2. In a pie crust forming device, the combination of two pairs ofopposed rollers j ournaled on substantially parallel axes, means forfeeding dough from one pair to the other, and a cutter located betweensaid pairs of rollers and adapted to cut the dough into sections ofuniform length in its passage between said rollers, the second pair ofrollers being driven at a considerably greater peripheral speed than thefirst pair.

Signed at Chicago this 18th day of May, 1908.

OLIVER OOLBORNE.

lVitncsses E. O. RUMMLER, MARY M. DILLMAN.

